Investigating the effect of colloids on the performance of a biofilm membrane reactor (BF-MBR) for treatment of municipal wastewater

T. Leiknes*, I. Ivanovic, H. Ødegaard

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Performance of membrane reactor in combination with moving-bed-biofilm reactor (BF-MBR) for treatment of municipal wastewater was investigated in relation to different organic loading rates; high and low rates. The membrane was operated with a constant flux of 50 LMH and 96% recovery. The fouling rate was evaluated as development of the trans-membrane pressure (TMP) during the operational time. Suspended solids (SS) concentrations, organic matter (COD/FCOD), particle size distributions (PSD), capillary suction time (CST) and time to filter (TTF) were measured daily and further related to TMP in order to determine major fouling factors. A higher fouling potential was observed for high-rate operating conditions. A fraction of organic matter below 1.2 μm was mostly related to changes in TMP. Furthermore, a higher amount of particulate fraction below 0.1 μm in membrane reactors during high-rate operating conditions presented a dominant contribution to membrane fouling and colloidal fouling.

Original languageEnglish (US)
Pages (from-to)708-714
Number of pages7
JournalWater SA
Volume32
Issue number5 SPEC. ISS.
StatePublished - 2006
Externally publishedYes

Keywords

  • Biofilm membrane reactor
  • Colloidal fouling
  • Fractional COD distribution
  • Particle size distribution

ASJC Scopus subject areas

  • Water Science and Technology

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